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| author | Peter Lieven | 2013-10-24 12:06:52 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2013-11-28 10:30:51 +0100 |
| commit | d32f35cbc5a87af5e1100dd55074a79fc2cb5307 (patch) | |
| tree | 55fa60fcbf692789af57904cb5bc84be7b649df7 /block | |
| parent | block: add flags to bdrv_*_write_zeroes (diff) | |
| download | qemu-d32f35cbc5a87af5e1100dd55074a79fc2cb5307.tar.gz qemu-d32f35cbc5a87af5e1100dd55074a79fc2cb5307.tar.xz qemu-d32f35cbc5a87af5e1100dd55074a79fc2cb5307.zip | |
block: introduce BDRV_REQ_MAY_UNMAP request flag
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/backup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/backup.c b/block/backup.c index 830a179d6d..0198514043 100644 --- a/block/backup.c +++ b/block/backup.c @@ -139,7 +139,7 @@ static int coroutine_fn backup_do_cow(BlockDriverState *bs, if (buffer_is_zero(iov.iov_base, iov.iov_len)) { ret = bdrv_co_write_zeroes(job->target, start * BACKUP_SECTORS_PER_CLUSTER, - n, 0); + n, BDRV_REQ_MAY_UNMAP); } else { ret = bdrv_co_writev(job->target, start * BACKUP_SECTORS_PER_CLUSTER, n, |